3	5		8	6
				8	7		4
	8
						7
2		6	5
6	1		2	4

Difficulty: Very easy (0)

2					7
				1
4				3	8
			5		6
		3		4
		1	4				5
			8
		4					6

Difficulty: Very easy (0)

4			3			6
	6	8
			6
			5			2
	5			2
				3
					5	1
	2			8			3

Difficulty: Very easy (0)

	6					1
	5			6
4
8	2		7
				4		3	2
							5
			2			8
	7					4

Difficulty: Medium (0)